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IMPURITIES IN COPPER

Objective



The purity of electrolytically refined copper (e.g. for use in electric cables) must comply with internationally agreed norms which require the determination of 19 elements: Ag, As, Bi, Cd, Co, Cr, Fe, Mn, Ni, O, P, Pb, S, Sb, Se, Si, Sn, Te and Zn. Most of these are routinely determined by optical emission spectrometry, but the results of various laboratories do not always agree well. Considering the economic importance, industry has requested the BCR to certify reference materials.

RESULTS

Two reference materials have been certified for 15 elements:
CRM 074: electrolytically refined copper
CRM 075: copper with added impurities (levels close to specified maxima)
A separate reference material (CRM 017) was certified for S and P (10 resp. 7 mg/kg).
Certification reports: EUR 12318 (1989) (CRM 017)
EUR 14055 (1992) (CRMs 074 and 075)

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

BICC plc
Address

Prescot
United Kingdom

Participants (19)

Central Bureau for Nuclear Measurements
Belgium
Address

Geel
Commissariat à l'Energie Atomique (CEA)
France
Address
Centre D'études De Fontenay-aux-roses
92265 Fontenay-aux-roses
Energieonderzoekcentrum Nederland
Netherlands
Address

Petten
FEDERAL INSTITUTE FOR MATERIAL RESEARCH AND TESTING
Germany
Address
87,Unter Der Eichen 87
12205 Berlin
FORSCHUNGSZENTRUM JUELICH GMBH
Germany
Address
Wilhelm Johnen Strasse
52425 Juelich
GSF - FORSCHUNGSZENTRUM FUER UMWELT UND GESUNDHEIT GMBH
Germany
Address
Ingolstaedter Landstrasse 1
85764 Neuherberg
Hüttenwerke Kayser AG
Germany
Address
Kupfer Straße 23
44532 Lünen
IMI Refiners Ltd
United Kingdom
Address
Darlaston Road
WS2 9SJ Walsall
Instituut voor Nucleaire Wetenschappen (RUG)
Belgium
Isotopcentralen
Denmark
Address

Copenhagen
Max-Planck-Gesellschaft zur Förderung der Wissenschaften eV
Germany
Address
Bunsen-kirchhoff-straße 13
44139 Dortmund
Metallurgie Hoboken-Overpelt
Belgium
Address

Hoboken
Metallurgie Hoboken-Overpelt
Belgium
Address

Olen
Norddeutsche Affinerie
Germany
Address

Hamburg
Philips Natuurkundig Laboratorium
Netherlands
Address

Eindhoven
Prof. Kraft
Germany
Address

Kronberg
Risoe National Laboratory
Denmark
Address

Roskilde
UNIVERSITAET REGENSBURG
Germany
Address
Universitaetsstrasse 31
Regensburg
VG Elemental
United Kingdom
Address

CW7 Winsford